Grommet



FIG. 1 is a perspective view of a grommet showing the new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a first side view thereof, the opposite side being the same; and,

FIG. 5 is a second side view thereof, the second side view being adjacent to the first side view, and the opposite side of the second side being the same as the second side.

The broken line portions of the disclosure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a grommet, as shown and described. 